package com.xxxx.server.config.security;

import org.springframework.security.access.AccessDecisionManager;
import org.springframework.security.access.AccessDeniedException;
import org.springframework.security.access.ConfigAttribute;
import org.springframework.security.authentication.AnonymousAuthenticationToken;
import org.springframework.security.authentication.InsufficientAuthenticationException;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.stereotype.Component;

import java.util.Collection;

/*权限控制
* 判断用户角色
* */
@Component
public class CustomUrlDecisionManager implements AccessDecisionManager {
    @Override
    public void decide(Authentication authentication, Object o, Collection<ConfigAttribute> collection) throws AccessDeniedException, InsufficientAuthenticationException {
         for (ConfigAttribute configAttribute : collection){
             //当前url所需要的角色
             String needRole = configAttribute.getAttribute();
             //判断角色是否登录即可访问角色，此角色在CustomFilter中设置
             if("ROLE_LOGIN".equals(needRole)){
                 //判断是否登录
                 if(authentication instanceof AnonymousAuthenticationToken){
                     throw new AccessDeniedException("尚未登录，请登录");
                 }else {
                     return;
                 }
             }
             Collection<? extends GrantedAuthority> authorities = authentication.getAuthorities();
             for (GrantedAuthority authority : authorities) {
                 if(authority.getAuthority().equals(needRole)){
                     return;
                 }
             }
         }
         throw new AccessDeniedException("权限不足，请联系管理员");
    }

    @Override
    public boolean supports(ConfigAttribute configAttribute) {
        return false;
    }

    @Override
    public boolean supports(Class<?> aClass) {
        return false;
    }
}
